Ignition governor



Dec. 6, 1932. I J, MAR-UN 1,889,755

IGNITION GOVERNOR Filed May 12, 1952 JOHN F. MARTIN .5. I INVENTOR Y Q43 2. QM w ATTORNEY Patented Dec. 6, 1932 UNITED f STATES PATENT oFF -e JOHN F. MARTIN, 0F SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TOUNI'IEID AMERICAN BOSCH CORPORATION, OF SPRINGFIELD, MASSACHUSETTS, A CORPORATION OF NEW YORK Application filed May 12,

- This invention relates to improvements ingovernorsor speed regulators, and particularly togovernors or speed regulators for internal combustion engines.

An object of the invention is to provide a simple and elficient speed regulator ,of the hit-and-miss type especially adapted for an internal combustion engine havlng a device for producing ignition current, such as a magneto, associated with the flywheel thereof. In its preferred form the governor controls the circuit breaker of the magneto and operates to suspend ignition when the speed of the englne exceeds a predetermlned number of revolutions per minute. i

Other objects and advantages of the invention are set forth in the ensuing description,

taken with the accompanying drawing in which an embodiment of'the invention is illustrated but the disclosure is explanatory only and various changes in the detail may of course be made without departing from the spirit of the invention or exceeding the scope of the appended claims. On the drawing: i i Fig. 1 shows a front or outside elevation partly in section of a flywheel carrying a por- In the description of what the drawing sets forth, the numeral 1 indicates the web of a flywheel having a rim 2'and a hub 3, the lat ter having a bore 4 to enable theflywheel to be mounted upon a crank shaft of .an'inte'rnal combustion engine; a keyway 5 being provided in the hub so that the flywheel can be firmly connected to the shaft. As shown in Fig. 1 the front or outside of the flywheel is presented to the observer so that the web between the hub and rim is seen and the rim 2 extends away from the observer, the web being partly broken away to enable the governor and the mode of mounting the same.

on the front of the flywheel to be shown.

IGNITION GOVERNOR 1 1932. Serial no; 610,823.

VVhen the flywheel is mounted onthe crank of timing the ignition in the usual way; The

plate carrying'the generating coil and its core willalso support a circuit interrupter comprising apair of relatively movable contact points for opening the primary circuit'of the coil at each instant of ignition. A portion of such a circuit interrupter is diagrammatically indicated at 8, but the coil itself with its core and pole pieces and the plate or .disc which mounts these portions of the .ma'gneto on the engine concentric with the I hub 3 are not illustrated, as they form no part of this invention. I

' The speed regulatorcooperates with the interrupter lever 8 and comprises an arm 9 mounted to rotate on a journal 10 aflixed to the web 1 of the flywheel on the inner side ad acent thehub 3. From this journal one part of the arm 9 extends radiallyoutward and terminates in an enlarged end 11 which is yleldably anchoredto the flywheel at a point near the rim by-a helical spring 12., The other I end of-the arm on the opposite side of the journal 10 carries a boss 13 having a bore 14 to receive a pivot pin 15. One end of this pin carries a roller l6and the two ends of the pin are headed over as shown at 17 and 18,

mary circuit of the coil and produce the spark. -When, however, the speed rises beyond a predetermined limit, the weighted end "11 of the arm 9 willbe moved outward by centrifugal force and the other end ca'rry-.

' ECO gage the journal 10 and in its outer end it has.

two threaded openings 21 and 22, the former extending across the arm and the other lengthwise thereof. Against the outer face of the enlarged end 11 is disposed a connecting member 23 which is held against this face by a screw 24 passing through a slot 25 in said member and into the threaded bore 22. One

end of this member is bent over at 26 and f connected to one end of the spring 12, the other end of this spring being anchored to a stud 27 on the flywheel 1. The opposite end of the member 23 is bent over at 28 and shaped to give passage to a headed bolt 29 avhich enters the other threaded opening 21; and the inner face of the web of the flywheel may have an opening at 30 to provide a space through which the governor may be adjusted from the outside of the flywheel.

In practice when the engine 1 is in operation the rotation of the flywheel will carry the pole pieces 7 of the magnets 6' past the pole pieces of the generating coil to energize the latter and a spark will be produced whenever the roller 16 strikes the interrupter lever 8 and separates the contact points. But, if the. speed should rise beyond the selected limit, the centrifugal force will overcome the spring 12 and the weighted end of the arm 9 will move out so that the other end having the roller 16 will clear the interrupter lever 8 and the contact points of the magneto will not be opened. The member 23 can be adjustably secured to the end 11 by means of the bolts 24 and 29 and thus the point at which the governor becomes effective to suspend ignition can be varied. V

- It will be seen from Fig. 1 that in the normal position of the governor, the member 23 and the outer face of the end 11 are not in alinement with the spring 12, but this member extends toward the spring; and the end 26 which is bent over is therefore short and r the pull of the spring thereon is'exert-ed at a claimed is a From the foregoing description it will be apparent that the'invention is embodied in a.

7 very simple and practical construction which 71s inexpensive to make, easy to install and certain and accurate in operation.

1. A speed regulator for a magneto on the flywheel of an engine comprising an arm journalled on the flywheel in position to engage aninterrupter lever of the magneto at one end, said arm having a Weight at the opposite end, a spring connecting said end to the flywheel and an adjustable member between said spring and said arm.

2. A speed regulator for a magneto on the flywheel of an engine comprising an arm journalled on said flywheel in position for one end to operate an interrupter lever of the magneto, the other end being weighted to prevent such operation at a predetermined speed limit, a spring to connect the other end to the flywheel, a member attached to'said end and to said spring, and adjustable fastening devices securing said member to said arm to enable the position of said member to be altered.

3. A governor for a flywheel magneto on the flywheel of an engine comprising an arm journalled on the flywheel in position to enable one end thereofto operate'the interrupter contacts of the magneto, the opposite end of said arm being enlarged and the outer face of said end being oblique, a spring connected to the flywheel, a member disposed against the outer face of said enlarged end and having one end also joined to said spring,

fastening devices securing said member to the enlargedend at the outer face thereof, said member being slotted adjacent said outer face, and bolts'to attach said member to the arm and permit adjustment thereof.

4:. A speed regulator for an internal combustion engine having a magneto on the flywheel thereof, a lever arm journalled on said flywheel having a contact roller at one end in I position to engage the interrupter lever of the magneto,'and having its opposite end enlarged, a spring connecting the enlarged end at one sideto the flywheel, the outer face of said enlarged end being out of alinement with the spring when the governor is in its working position, a slotted connecting member against the outer face of said end, one end of said member being connected to said llU spring, a bolt passing through said member and into said face ofthe end and a second bolt passing through the other end of said member and into the enlarged end on the opposite side of said arm, said bolts permitting adjustment of said member, the arm operating to carry said outer face and said member'into approximate alinement with the spring when a predetermined speed limit is reached.

r In testimony whereof I offix my signature. JOHN F. MARTIN.

Having described the invention, whatis 

